Elements and Performance Criteria

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Standard procedures
Standard procedures may be found in any or all of:
state/territory/Commonwealth OHS legislation, regulations and codes
Australian Standards
equipment manufacturers' specifications and procedures
industry practices
safety manual
maintenance schedules
work instructions
maintenance organisation manual
MSDS
Defence regulations and instructions
standing instructions
Faults
Faults may include:
contamination
corrosion
cracks
excessive wearing
fraying
incorrect manufacture
intermittent communication
leaks
perishing
Parts of the oxygen mask
Parts of the oxygen mask may include:
communication system (e.g. microphone)
delivery tube
exo-skeleton (e.g. outer shell)
face piece (e.g. may include trimming)
retention system (e.g. strap)
valves
Communication system components
Communication system components may include:
microphone
electric cables
switches
Adjustable components
Components may include:
retention system (e.g. strap)
seals
Application
Application of this unit may relate to:
scheduled or unscheduled maintenance activities
individual or team-related activities

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to maintain and fit oxygen masks while observing all relevant safety precautions, especially those relating to oxygen.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The underlying skills inherent in this unit should be transferable across a range of aircraft life support equipment maintenance activities. It is essential that oxygen mask testing and inspection procedures, cleanliness requirements and safety precautions are fully observed, understood and complied with. Ability to interpret maintenance and fitting procedures and apply them in practice is critical.
Evidence of transferability of skills and knowledge related to oxygen mask maintenance and fitting is essential. This is to be demonstrated through demonstration of the ability to recognise faults and damage and perform appropriate repairs that are within the bounds of the individual's authority, and through the demonstration of correct fitting procedures. The work plan should take account of applicable safety and quality requirements in accordance with the industry and regulatory standards.
A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements of the unit of competency are being achieved under routine supervision on at least three (3) unserviceable oxygen masks providing a representative range of maintenance tasks and on the correct fitting of oxygen masks to at least three individuals. This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide.
Context of and specific resources for assessment
Competency should be assessed in the workplace or simulated workplace using materials, tools and equipment specified in the maintenance manuals and applicable procedures. It is also expected that general and special purpose tools and ground support equipment would be used where appropriate.
Method of assessment

Guidance information for assessment